Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2881b3ddf56edce…

MALICIOUS

PDF

71.2 KB Created: 2021-02-17 11:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a3cbbac68cff6333a96f767436d73e90 SHA-1: b5ddc81fe62c965e1ba3784aa25a55ec2c850538 SHA-256: a2881b3ddf56edce6f6e91f1da41255314263fbf9d472e88c7728fc70a4672ca
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wix?keyword=pathfinder+hybridization+funnel PDF link annotation
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/962977.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/EijEpij/clash_of_clans_base_layout_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/ddqhcLt/ice_cream_roll_maker_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/dazenolaxuj/f6gjShh/nukuvakowikuze.pdfIn PDF document text
    • https://cdn.sqhk.co/tesikotuk/hbgd85T/63189255309.pdfIn PDF document text
    • http://revenularozudo.66ghz.com/simple_admin_panel_bootstrap_template_free.pdfIn PDF document text
    • https://xitokudid.weebly.com/uploads/1/3/4/6/134688137/gazoxenolujum.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/dhh8jhC/golefivajikibar.pdfIn PDF document text
    • http://podcard2020.site/mecano_grandes_exitos_descargar_megadhmcu.pdfIn PDF document text
    • https://cdn.sqhk.co/xidujefonari/b9TicQ2/nopusirikutafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pibozaxasoloje.rf.gd/how_can_i_get_rid_of_pimple_marks.pdfIn PDF document text
    • http://pawolukexuw.epizy.com/android_strategy_games_like_age_of_empires.pdfIn PDF document text
    • http://wepukuxazej.rf.gd/hseni_accident_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/bansidhar_chaudhary_ka_bhojpuri_gana_mp4.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 5108 bytes
SHA-256: 26ae0985d276404af0fa51136a3686239665c4c09cb552f924d092cb8a8e7631
font_01_sfnt_off0000ecba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBA 10344 bytes
SHA-256: 15c954db31e83f381451bf98a0656dd6d58cf4c9932ba4b5f204248f862f26b5